How Land-use Pattern Influence the Urban Vitality? A Case Study in Shenzhen, China Based on Public Transportation Data

Rapid urbanization has brought about many "urban diseases" in China, such as separation of the workplace and residence, traffic congestion, lack of public spaces, reduction in sense of urban space acquisition, which results in the lower urban space quality and urban vitality.Reshaping urban vitality and improving urban space quality are gaining much attention in urban planning.In this paper, we explored the spatiotemporal characteristics of residents' travels to reveal the spatial pattern of residence, employment, transportation and entertainment in Shenzhen based on public transportation data.We proposed a new method to evaluate urban vitality to show the spatial distribution in Shenzhen according to Jane Jacobs's notions.The result shows the most dynamic areas of Shenzhen are mainly located on the core areas of Futian, Luohu and Nanshan districts with a trend of decline from the centers to suburbs.Then a regression model was established to discuss the relationship between the built environment and urban vitality by analyzing the effects of land-use type, intensity, and mixture on urban vitality.The analysis suggests that both land-use intensity and mixture play a positive role in urban vitality.More specifically, mixed land use is a key factor affecting the sustainability of urban vitality.In addition, commercial land can bring more urban vitality effects than residential and official land because of the high passenger flow intensity and sustainability.